#include "stdafx.h" #include <event2/dns.h> #include <event2/bufferevent.h> #include <event2/buffer.h> #include <event2/util.h> #include <event2/event.h> #include <stdio.h> void readcb(struct bufferevent *bev, void *ptr) { char buf[1024]; int n; struct evbuffer *input = bufferevent_get_input(bev); while ((n = evbuffer_remove(input, buf, sizeof(buf))) > 0) { fwrite(buf, 1, n, stdout); } } void eventcb(struct bufferevent *bev, short events, void *ptr) { if (events & BEV_EVENT_CONNECTED) { printf("Connect okay.\n"); } else if (events & (BEV_EVENT_ERROR|BEV_EVENT_EOF)) { struct event_base *base = (struct event_base *)ptr; if (events & BEV_EVENT_ERROR) { int err = bufferevent_socket_get_dns_error(bev); if (err) printf("DNS error: %s\n", evutil_gai_strerror(err)); } printf("Closing\n"); bufferevent_free(bev); event_base_loopexit(base, NULL); } } int main(int argc, char **argv) { struct event_base *base; struct evdns_base *dns_base; struct bufferevent *bev; WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD( 2, 2 ); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) { return -1; } if (argc != 3) { printf("Trivial HTTP 0.x client\n" "Syntax: %s [hostname] [resource]\n" "Example: %s www.google.com /\n",argv[0],argv[0]); return 1; } base = event_base_new(); dns_base = evdns_base_new(base, 1); bev = bufferevent_socket_new(base, -1, BEV_OPT_CLOSE_ON_FREE); bufferevent_setcb(bev, readcb, NULL, eventcb, base); bufferevent_enable(bev, EV_READ|EV_WRITE); evbuffer_add_printf(bufferevent_get_output(bev), "GET %s\r\n", argv[2]); bufferevent_socket_connect_hostname( bev, dns_base, AF_UNSPEC, argv[1], 80); event_base_dispatch(base); WSACleanup(); return 0; }